Safety gas-tip.



P. P. HEIN.

SAFETY GAS TIP.

APPLICATION FILED MAI/16.1918.

Lwwe Pawn/wd M1919.

BFM

A TTORNEYS Penny. anni', or NEW Yonx, n. Y.

FFICE.

sanary ens-rrr.

To all whom t may concern: 'Y

Be it known that I, PAUL P. HEIN, a `citizen of the United States, and a resident of the city of New tan, inthe county have invented a new and Improved .Safety Gras-Tip, of which the following is a full,-

clear, and exact description.

This invention relates to gas tips, and-has particularl reference .to a gas fitting o r appliance that will close automatically and so stop the flow 'of gas in the event that the y p. ing my improved gas tip complete, the valve e It is awell known fact that the iame of yiame is extinguished by any means.

an ignited gas tip is liable to be extinguished by wind or a draft blowing against it, by the dropping of the pressure of gas atthe source, especially when the gas flame is turned low, and by other causes, and it is also a well known fact that the valve of a gas tip as ordinarily'constructed is apt to be struck or otherwise turned inadvertently when there is no intention to ignite the gas, therebyV leaving the' valve open and permitting the gas to escape..I It follows,therefore, that there is not only a waste of gas but the more importantfact of the dangerl of asphyxiation that is likely to result.

t fore is to provide a simpleand certainexpedient. whereby the valve will `be automatically closed almost. instantly after the y.flamme is extinguished :or will be returned immediately to its closed osition in' the i event of inadvertent or' accidental opening v of the valve.

. Iam aware that'nunierous devicesy have 1 lbeen proposed heretofore for this same genil eral purpose but so farv as l have been adi' vised the prlor devices are of an expensive and complicated nature land so vsubject to criticism on two main grounds:First, they J are too expensive to be vinstalled by the ori 14 ofthe burner, '1s or may be of any apdinary comman users of gas tips for their protectiomand secondly being of a delicate and complicated nature are apt to fail when they should be .relied upon. It n follows, therefore, that another object aimed at in this construction 'm to V'provide anv attacht ment vfor a gas tip' that is so. simple and. cheap in its make-up that the cost 'for installation is practical y Specification of Iletters Patent.

York, borough of Manhatv and State of NewYork,

`3--3 of Fig. 1.

Among the objects of the invention therenegligible; also from the nature of the attachment set forth here- Patented Feb. 25, relie.

Application led May 16, 1918. Serial No. 234,969. v i

With the foregoing and other objects in viewtbe invention consists in the arrangement and 'combination of parts hereinafter described and claimed, and while the invention is not restricted lto theexact details of`- construction disclosed er suggested herein, l

still for the'purpose of illustrating a prac- .tical embodiment thereof reference is had to the accompanyingidrawings, in whichv like reference characters -designate the- Same parts in the severalfviews, and in which- Figure 1 is a vertical sectional view show- Fig. 2 is a side elevation of the same seen lfrom the left side .ofFig l; and

Fig. 3 is a horizontal section on theline -Referring now more particularly-to the drawings, 'I show a gas attachment comprising a burner body 10 having an internally Vthreaded flange 11.-l This burner is designed with reference to the threaded iange 11 to be substituted for the-usual burner tube which` carries the tip 12 or. tobe `added if* desired as an extension to the usual valve body .in 'present installations. 'In other words Wherea buildingis equipped with as i appliances lall Athat is necessary toinstall t is improvement is to unscrew each standard burner tube froml the xture having the valve: and, apply this improvement tothe same Ixture leaving the original valve. In

lnew installations, however, this improvement will be. applied directlyto the fixtures so that. onlyone valve .will be'employed at each fixture. i j l The valve pgoper shown at 13, having a transverse hole 13. registering with the bore proved construction so far as the control of earned. .f As usual it is provided with a finger piece 15 at one 'end for the usual manipulation by hand either to turn the valve to ig nite the gas or to extinguishthe gas in the usual way. The stop ugl coperates with a shoulder 17:.in any well known manner to?l limitthe rotary movement of the fvalve in the closing direction.

At `any convenient place, preferablyat of the valve 13, it` being held in fixed position on the valve by means of a screw 2O,

or its equivalent. This friction member may be stamped Aconveniently out of relatively thin cheap sheet metal.` rlhe flange 19 may be relatively shallow but provides a guard or keeper for a resilient shoe 21y Which is adapted to bear against the outer face of them disk 18. Y The shoe 21 is indicated in elevation in Fig. 2 and comprises preferably a plurality-of independent lingers the ends of which are adapted to bear against either the outer face of the disk 18 or inner surface of the flange 19, or both of these surfaces, While the gas flame is burning. lllien, however, the device is in normal cold condition 'and the valve is closed the shoe may bear very lightly against the outer face of the diskv or even be spaced slightly therefrom so that the flange 19 serves to prevent any possible lateral movement of the shoe with respect to the axis of the valve and friction member.

As a preferred means for actuating the shoe l provide an expansion member '22 in the nature of a simple straight bar of metal such as steel or common iron. A@ne end i2 of this expansion bar has threaded engagement in the upper end of a standard 23 while the other end of the bar abuts squarely against the upper shorter arm 24a of a lever 24 of the first class. rlhis lever is pivoted at 25 in the fork 2G of a standard 27 formed on the side of the burner diametrically opposite the standard 28. The' aforesaid resilient shoe 21 is xed upon or carried by the extreme lower end of the arm 24e of the lever, or at least the shoe is held in the friction member in some convenient vmanner so as to be actuated by the inward movement of the lovver end of said longer arm.

. r`lhe parts thus far described are designed with respect to one another so as .to occasion little or no frictional contact between the shoe 21 and disk 18 when the bar 22 is cold, but when the bar is hot the increment added to its length by its expansion `will cause the bar to bear against the shorter arm of the lever causing the longer arm thereof to approachthe dotted line position en Fig. 1, and v,thus cause the shoe to bear upon the d1slr-l8 with sufficient friction to hold the valve open. Almost instantly, however, u pon the` cooling lof the bar 24 the contrae tion .thereofvvill relieve the pressure or the shoeon the disk. The threading of the bar into the upper end ot the standard 28, how- -erenprovides for longitudinal adiustment of the har 22 so as to delicately 1|.

retenes the noperation of the parts as intended, either at the time of assemblage or at any subsequent time.

-28 indicates a spring illustrated as in the f'orm of a coil surrounding a body extension 10 between the disk 18 and the body 10 of the burner. One end 28*L thereof being in engagement with the body 10 and the other end thereof being in engagement with the -disk 18, the important function of this spring Iis to cause through its torsional force the valve to close automatically after the spring has been Wound by the opening of the valve by hand, the direction of auto- 'matic closing being indicated-by the arrow on Fig.l 3.

With the foregoing detail description of the mechanism a brief statement of the op eration should suice. lf the. valve 13 is the only valve employed the operator to light the gas will apply the match or taper with one hand While he opens the valve slowly so as to turn the gas on moderately with his other hand. lt is Well understood that.

when the gas pressure is high the gas should be turned on moderately to prevent the dow of gas blowing out the taper or match. Therefore with the valve opened slowly and the gas lighted While the pressure is lovv, the heat developed by this time and With the turning on of the gas to full dow and adjusting thel valve to the desired volume of dame, the expansion member 22 will have been sufficiently heated to cause the friction the position to 1Which it is turned by the operator, hence the operator gives no attenshoe .to grip the disk and hold the valve in i out by hand in the'usual vvay the operator i turns the valve 'accordingly bringing the stop 16 against the shoulder 1?. The design of the friction disk and shoe is such that the frictional grip incident to the heated bar 22 is not sufficient to prevent vthis closing of i the valve by hand. When, however, the

' flame .is extinguished unintentionally by any means the bar 22 contracts suciently with# in two or two and one half seconds to reu lease the frictional grip between the shoe and the" disk, so setting` the spring 28 free to close the valve. If my improvement has been applied as an auxiliary to an existin gas valve the standard valve may be lettV ber heatedby the gas flame, means actuated by the expansion of the expansion member and acting upon said shoe to cause it to grip the friction member with sufiicient friction tohold the valve""open, and means actin upon the valve tof`close the samev automatically when the grip aforesaid upon the r'ric-l tion mem'ber is relleved incident to the cooling of the expansion member. y. V

2. The combination of a Agasv burner, a

rotary valve fitted therein, means connected' to the valve to automatically close the same,

a. friction disk concentric wlth the valve and thereof, a vresilient shoe coperatin with the side of the disk remote from the urner, a lever of the firstclass having longer and vlying in a plane perpendiculart'o the axis shorter arms, a pair of standards carried on diametrically opposite sides of the burner, said lever being pivoted upon one of sald standards and an expansion member carried by the other standard and having its free end abutting against the `shorter arm of the lever across ,the plane of the gas. flame whereby the expansionv member when heated.' i v Will cause through said longer arm the gripping engagement between the shoe andthe l disk to resist the action 'of the 'automatic closing means. .,I a

PAUL P. HEIN. 

